- #1
Loren Booda
- 3,115
- 4
Does DNA ever occur as a complete uniform ring, rather than a(n approximate) strand?
Does DNA Occur as a Complete Uniform Ring Structure?
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Discussion Overview
The discussion centers around the structure of DNA, specifically whether it can exist as a complete uniform ring rather than in a strand form. The scope includes theoretical considerations and biological examples.
Discussion Character
- Exploratory, Technical explanation, Debate/contested
Main Points Raised
- One participant asks if DNA can occur as a complete uniform ring structure.
- Another participant asserts that bacteria possess circular chromosomes and plasmids, suggesting that DNA can exist in a ring form.
- A third participant adds that circular DNA is also found in mitochondria, chloroplasts, and some viral genomes, supporting the idea of circular DNA structures.
- A fourth participant references a PDF on topologically non-linked circular duplex DNA, implying further technical exploration of the topic.
- A fifth participant expresses confusion about the location of the referenced PDF, indicating a lack of clarity in the discussion.
Areas of Agreement / Disagreement
Participants present multiple views on the existence of circular DNA, with some agreeing on its presence in specific organisms, while the discussion remains unresolved regarding the generality of the question posed.
Contextual Notes
Participants do not clarify the definitions of "complete uniform ring" or the conditions under which DNA may be considered circular, leaving some assumptions unaddressed.
- #2
iansmith
Staff Emeritus
Science Advisor
Gold Member
- 1,317
- 2
Yes, bacteria have circular chromosome(s) and circular plasmid(s).
- #3
Monique
Staff Emeritus
Science Advisor
Gold Member
- 4,229
- 61
Also DNA present in mitochondria, chloroplasts and some viral genomes is circular.
- #4
NanoTech
- 62
- 0
Topologically Non-linked Circular Duplex DNA
Here's a good PDF on this topic.
Here's a good PDF on this topic.
- #5
one_raven
- 200
- 0
NanoTech said:
Where?
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